ValueError: Expected x to have 1 arrays, but got 8

[nczub]

Hi,
I tried to use autokeras, both for regression and classification problems.
I got error:
ValueError: Expected x to have 1 arrays, but got 8
I just tried it for 8 examples of pictures.
Each picture has a size 50x50 and 3 chanels.
In case of regression problem I checked:
for image in images:

print(image.shape)

(1, 50, 50, 3)
(1, 50, 50, 3)
(1, 50, 50, 3)
(1, 50, 50, 3)
(1, 50, 50, 3)
(1, 50, 50, 3)
(1, 50, 50, 3)
(1, 50, 50, 3)

and about labels:
print(labels.shape)
print(labels.dtype)

(8,)
float64

Why do I still get this error?